// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV
}) // 使用当前云环境
const collection = 'comments';
const db = cloud.database();
// 云函数入口函数
exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()
  let {
    id,
    comments
  } = event;
  db.collection(collection).where({
    id
  }).update({
    data: {
      comments: db.command.set(comments)
    },
  });
  return {
    event,
    openid: wxContext.OPENID,
    appid: wxContext.APPID,
    unionid: wxContext.UNIONID,
  }
}